JPH01252462A - Transport in thatch laying form of corrugated cardboard sheet and cutting of sheet - Google Patents

Abstract

PURPOSE:To neatly superpose sheets in laid tile form in each lot by introducing the corrugated cardboard sheets which are cut in each prescribed dimension and transported at the first speed, into the upper and lower conveyors in two stages alternately and reducing the speed. CONSTITUTION:A corrugated cardboard sheet S on a carrying-in conveyor 1 is transported at the first speed, and transported onto an upper stage conveyor 3a. Since the conveyor 3a is operated at the second speed lower than the first speed, the sheet S is formed into a laid tile form in which a part of the sheet S is superposed, and transported onto a lap conveyor through a selecting device 9 and the second separating conveyor 4. When one lot portion is carried onto the conveyor 3a, the conveyor 3a rises, and the lower stage conveyor 3b is connected to the conveyor 1, and the next lot is transported onto the conveyor 3b. Since, at this time, the conveyor 3b is operated at the third speed lower than the speed of the conveyor 3a, a gap is generated between the preceding lot and the next lot, and when a prescribed interval D is formed, the speed of the conveyor 3b is increased to the second speed.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a method for separating sheets in a tiled conveyance method for corrugated cardboard sheets, and in particular, after producing unbroken corrugated cardboard sheets from base paper, cutting the sheets at predetermined intervals The present invention relates to a sheet separation method for separating the tiled corrugated cardboard sheets into a predetermined number of sheets when cutting, further conveying the tiled cardboard sheets into a predetermined number and loading them into a stacker.

"Prior Art" Generally, corrugated sheets are manufactured by attaching liner paper to corrugated corrugated core paper. The uncut corrugated pole sheets manufactured in this manner are cut into predetermined dimensions and transported at a preset speed in rows where adjacent sheets do not overlap, and then transferred to a stamper. For each number of sheets to be piled up, each adjacent corrugated sheet is made into a tiled roof with some parts overlapping each other for each so-called loft.
Stack the cardboard sheets in each loft on the stacker.

Once the stacker has loaded corrugated sheets in each loft, it is carried out to another location, and the next empty stacker is carried in to the location where the corrugated sheets are to be stacked.

Conventionally, the method of forming the corrugated cardboard sheet into a tiled roof shape and separating it into lofts is to cut the corrugated cardboard sheets into predetermined dimensions and cut them into rows at high speed without overlapping adjacent ones.
It is known that a corrugated cardboard sheet is conveyed at a speed of 1,000 yen, and is received by a plurality of conveyors arranged vertically and whose conveying speed is variable. In other words, a conveyor receives corrugated sheets that are conveyed in rows at a first speed, and then conveys them at a second speed, which is slower than the first speed, so that the corrugated sheets that are adjacent to each other are partially overlapped in a tiled pattern. After tiling the predetermined number of sheets to be loaded on the stacker, so-called 10 feet, the conveyor is increased to the third speed, separated from the loft to be loaded on the stacker next, and the distance between the lofts, that is, the front When the distance between the rear end of one loft and the front end of the next loft reaches a predetermined value, the speed at which the front loft is transported toward the stunker is reduced to a fourth speed. The distance between the lofts corresponds approximately to the time it takes for the stacker to load 10 tons of corrugated cardboard sheets, carry them out to another location, and then set up the next loft for loading.

In addition to the method of varying the conveyance speed by a conveyor as described above, the conventional sheet separation method uses a suction device, a locking plate, etc. to forcibly keep the corrugated sheets conveyed in a row at the above-mentioned first speed constant. A method of separating each loft by hooking only time, and a method of combining these two methods are known.

``Problems to be Solved by the Invention'' However, the method of separating corrugated cardboard sheets into individual lofts by varying the conveyance speed of the conveyor described above has the following problems: If the rear end of the front loft and the front end of the rear loft inadvertently touch each other, the tiles will not be piled up in an orderly manner, resulting in disorder, and the stacker will not be loaded properly. Multiple conveyors are installed vertically, and the conveyance speed of each conveyor must be controlled in multiple stages from the first speed to the fourth speed, and the speed control is performed in conjunction with the operation of each conveyor. Therefore, there is a problem that the speed control mechanism becomes complicated. In addition, a method of separating each loft by forcibly hooking a locking plate or the like on corrugated cardboard sheets conveyed in a row, and a method of combining this method with a method of varying the conveyance speed of the conveyor described above. Even though the conveyor is in operation, a locking plate or the like is hooked to the corrugated sheet to forcibly stop it and separate each loft.
There is a problem in that the tiles are not stacked neatly in a tile-roofed pattern and are disturbed, resulting in poor stacking on the stacker and causing problems in a series of flow processes.

In view of the above circumstances, the present invention not only allows each lot to be piled up in an orderly tiled pattern without causing any disturbance, but also reduces the number of stages in which the conveyor conveyance speed can be varied. To provide a method for separating sheets in a tiled conveyance method for corrugated cardboard sheets, which requires a short process layer from loading to stacking on a stacker.

"Means for Solving the Problem" In order to achieve the above object, the present invention has a conveyor that receives corrugated cardboard sheets cut into predetermined dimensions and conveyed in rows, and the conveyor decelerates and conveys the sheets to a predetermined number of sheets. In the tiled conveyance method for corrugated cardboard sheets, in which a portion of adjacent corrugated cardboard sheets are overlapped to form a tiled roof and then conveyed toward a stacker, the corrugated cardboard is cut into the predetermined dimensions and conveyed at the first speed. The sheet is fed into one of the two upper and lower separation conveyors, and the one separation conveyor conveys the corrugated cardboard sheet in a tiled manner at a second speed lower than the first speed, and the one separation conveyor When a predetermined number of corrugated sheets are fed in, the corrugated sheets conveyed in a row at the next first speed are fed into the other separating conveyor, and the other separating conveyor is conveyed by the one separating conveyor. The tiled corrugated cardboard sheet to be removed is carried out from one separating conveyor and is conveyed to the second conveyor until it reaches a predetermined position.
This invention is characterized by a method for separating sheets in a tiled conveyance method for corrugated cardboard sheets, in which the corrugated cardboard sheets are conveyed at a third speed lower than the speed, and after passing the predetermined position, the speed is increased to a second speed.

``Example'' Below, an example of the sheet separation method in the tiled conveyance method for corrugated cardboard sheets according to the present invention will be explained based on the drawings. First, the first example shown in FIGS. 1 and 2 will be explained. We will explain the equipment for making corrugated paperboard sheets.The corrugated sheet S is produced by manufacturing an unbroken continuous sheet of corrugated corrugated core paper with liner paper pasted on it, then cutting it into predetermined dimensions according to the order, and then cutting it into individual pieces. High-speed conveyance in rows without overlapping sheets (hereinafter referred to as cylinder 1 speed)
It is designed to be fed into a carry-in conveyor 1 such as a sand winch conveyor. It goes without saying that the corrugated board sheet S can be of any fMN type, such as a single-face sheet in which a liner paper is pasted to a core paper, or a double-face sheet in which various single faces are pasted together. The carry-in conveyor 1 is provided with a first cut-off conveyor 3 that transports adjacent corrugated cardboard sheets for each number of sheets to be loaded on the down stunker 2 (to be described later), that is, for each loft, in a so-called tiled roof pattern in which adjacent corrugated sheets are partially overlapped. , a second separating conveyor 4, a lap conveyor 5, and a loading conveyor 6 are installed vertically.

The loading conveyor 6 is configured to load corrugated cardboard sheets S for each loft onto the pallets 7 of the down stunker 2 below. Furthermore, a telescopic conveyor 8 that can be freely moved in and out is disposed between the loading conveyor 6 and the down stunker 2. After the pallet 7 is automatically carried into the down stunker 2, it rises to the top and descends as corrugated sheets of a predetermined size are loaded, and after loading a predetermined number of sheets, it is transported from the down stunker 2 to the stocking area. etc., and are automatically transported to another location. The telescopic conveyor 8 is carried out from the down stacker 2 after loading a predetermined number of corrugated sheets S onto the pallet 7, and the next empty pallet 7 is carried into the down stacker 2.
It faces the discharge port of the loading conveyor 6 and receives the corrugated paperboard sheets S carried out from the loading conveyor 6 only during the setup time when it rises to a position where it can be loaded. After the telescopic conveyor 8 rises to a position where the pallet 7 can be loaded, the corrugated cardboard sheet S on the telescopic conveyor 8 is transferred onto the pallet 7, and thereafter the loading conveyor 6
Corrugated cardboard sheets S are loaded onto the pallet 7 from then on. As shown in FIG. 2, the first separation conveyor 3 has two stages, an upper and lower conveyor 3a and a lower conveyor 3b, and each of the upper and lower conveyors 3a and 3b is connected to the carry-in conveyor 1 in a timely manner. It is possible to move up and down. A switching device 9 is interposed between the first separating conveyor 3 and the second separating conveyor 4. The switching device 9 may be either a switching plate that swings about one end as a fulcrum or a switching conveyor.

Next, a method of separating sheets in a tiled conveyance method for corrugated cardboard sheets using the apparatus configured as described above will be described. First, as shown in FIG. 2, corrugated cardboard sheets S of a predetermined size are conveyed in rows by an inlet conveyor 1 without overlapping adjacent ones. The conveyance speed by the carry-in conveyor 1 is approximately the same as the speed at which the corrugated cardboard sheet S was manufactured, and this is hereinafter referred to as a first speed. When the corrugated paperboard sheet S on the carry-in conveyor 1 is first carried into the upper stage conveyor 3a as shown in FIG. Run at a second, slower speed. Therefore, the corrugated cardboard boxes carried onto the upper conveyor 3a form a tiled roof with parts of the adjacent ones overlapping each other.
It is conveyed onto the lap conveyor 5 via the switching device 9 and the second separation conveyor 4. The conveyance speed of the second separation conveyor 4 is a second speed that is the same as the conveyance speed of the upper stage conveyor 3a.

When a switching conveyor is used as the switching device 9,
Of course, the conveyance speed of the switching conveyor is also set to the second speed. When the number of sheets to be loaded on one barret 7, that is, 10 tons, is carried onto the upper conveyor 3a, as shown in FIG. In contrast, the lower conveyor 3b is connected, and thereby the next loft L2 of corrugated paperboard sheets S is carried onto the lower conveyor 3b. At this time,
The lower conveyor 3b is operated at a third speed lower than the conveyance speeds of the upper conveyor 3a and the second separation conveyor 4. Therefore, as shown in FIG. 2(c), as the front loft portion L1 is conveyed at the second speed from the upper stage conveyor 3a via the switching device 9 toward the second separation conveyor 4, the front loft portion A gap gradually occurs between the rear end of L1 and the front end of the next loft L2. When the rear end of the front loft reaches the specified position, it will move as shown in Figure 2 (d).
As shown in , the distance between the rear end of this loft portion and the front end of the next loft portion L2 reaches a predetermined value. The value of this interval is such that when the pallet 7 is loaded with a predetermined loft and moves to the IJJ operation for unloading from the down stunker 2, and the telescopic conveyor 8 moves and the loft is L2 from the discharge port of the loading conveyor 6. This corresponds to the setup time required until the vehicle can be loaded.

When the rear end of the front loft reaches a predetermined position where the distance corresponding to the D value can be maintained, a detector (not shown) detects this and increases the lower conveyor 3b from the third speed to the second speed. speed up When a predetermined number of corrugated sheets S, that is, a lot L2, are fed into the lower conveyor 3b, the first separation conveyor 3 descends, and further conveys the next loft of corrugated sheets S to the upper conveyor 3a.

At this time, the conveyance speed of the upper stage conveyor 3a has already reached the third level.
Change the setting to the speed. The upper stage conveyor 3a maintains the third speed until the rear end of the front loft portion LtO reaches the predetermined position in the same manner as described above, and when the rear end of the front loft portion LtO reaches the predetermined position, the upper stage conveyor 3a maintains the third speed. It is controlled to increase the speed. In the conveyance process after the second separation conveyor 4, the corrugated cardboard sheet is conveyed while maintaining the interval between each loft at the value D. After that, repeat the above operation to separate each loft so that there is a gap between them. Therefore, the conveyance speed of the second separation conveyor 4 and the separation device 9 when the separation conveyor is used can be maintained at the second speed.

In the first embodiment, the first separation conveyor 3 is moved up and down, but the same effect can be achieved even if the carry-in conveyor 1 is moved up and down and connected to the upper conveyor 3a and the lower conveyor 3b at appropriate times. Of course it can be done.

Next, a second embodiment shown in FIG. 3 will be described. The first separating conveyor 3 is fixed so that it cannot move up and down, or the amount of movement is smaller than that of the first embodiment, and the first
A first switching device 10 is disposed between the cut-off conveyor 3 and the carry-in conveyor l, and the first cut-off conveyor 3
A second switching device 11 is disposed between the cutting conveyor 4 and the second separating conveyor 4. First switching device 10
The second switching device 11 is composed of a pair of swingable upper and lower switching plates, and the feeding direction is switched by sandwiching the corrugated cardboard sheet between the upper and lower switching plates. The first switching device 10 and the second switching device 11 can also be of the conveyor type.

The first switching device 10 and the second switching device 11 are switched and connected toward the upper stage conveyor 3a, as shown in FIG. 3(a). This results in
First, it is transferred from the carry-in conveyor 1 to the upper conveyor 3a via the first switching device 10. At this time, the upper stage conveyor 3a operates at the second speed similarly to the above. Therefore, since the upper stage conveyor 3a has a lower transport speed than the transport speed of the input conveyor 1, the adjacent corrugated cardboard sheets S on the upper stage conveyor 3a have a tile-roofed structure that partially overlaps each other, and the second switching device 11 is The paper is conveyed onto the second cutting conveyor 4 via the paper.

The second separating conveyor 4 is operated at the second speed as in the first embodiment. Only the predetermined number of sheets, that is, 10
When L1 is fed into the upper conveyor 3a, the third
As shown in FIG.
The second corrugated sheet S is fed into the lower conveyor 3b. At this time, the lower conveyor 3b is operated at the third speed as in the first embodiment, and conveys the corrugated cardboard sheet S at a lower speed than the upper conveyor 3a and the second separation conveyor 4. Therefore, the upper stage conveyor 3a and the second
The separation conveyor 4 separates the front loft of the conveyed state, the rear end and the next loft L on the lower conveyor 3b! The distance between the front edge and the front edge of the When the rear end of the front loft portion is fed from the second switching device 11 onto the second separating conveyor 4, the second switching device 11 performs a switching operation. Front loft L
When the rear end of L2 reaches a predetermined position and the distance between it and the front end of the next loft L2 reaches a preset value as in the first embodiment, the lower conveyor 3b speeds up to the second speed. , the next loft L2 of corrugated cardboard sheets S is fed from the lower conveyor 3b to the second separation conveyor 4 via the second switching device 11. In the conveyance process after the second cut-off conveyor 4, the corrugated cardboard sheets S are conveyed with the interval between each lot maintained at the value D. When the corrugated paperboard sheet S having a loft amount L2 is fed into the lower stage conveyor 3b, the first switching conveyor 10 performs a switching operation to the upper stage conveyor 3a side, and further feeds the corrugated paperboard sheet S having the next loft amount into the upper stage conveyor 3a. Upper conveyor 3
is operated at the third speed until it reaches a predetermined position where the distance between the rear end of the front lot L2 and the front end of the next loft becomes D value in the same way as above, and the predetermined position is reached. Thereafter, the speed is increased to the second speed, and the second switching device 11 is switched to the upper stage conveyor 3a side.

Thereafter, the above operation is repeated. Of course, the second separation conveyor 4 is operated at the second speed without changing the conveyance speed.

In addition, in FIGS. 2 and 3, the switching device 9, the first
When a switching plate is used in the switching device 10 and the first switching device 11, the length of the switching plate is set to a value shorter than the length of the corrugated cardboard sheet +-S.

"Effects of the Invention" As described above, according to the sheet separation method in the method for conveying corrugated cardboard sheets in a tiled pattern according to the present invention, it is possible to stack sheets in a tiled pattern in an orderly manner without causing any disturbance in each loft. The number of stages in which the conveyance speed of the conveyor can be varied is also small, and the process length from receiving the corrugated sheets to loading them on the stacker is also short, making it very convenient to use.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a side view of a conveyance device that implements a sheet separation method in the tiled conveyance method for corrugated cardboard sheets according to the present invention, and FIG. 2 is a first embodiment of the sheet separation method. FIG. 3 is an explanatory diagram showing a second embodiment of the sheet cutting method. 1...il one person conveyor 2...down stunker 3...first separation conveyor 3a...upper stage conveyor 3b...lower stage conveyor 4
... Second separation conveyor 5 ... Wrap conveyor 6 ... Loading conveyor 7 ... Pallet 8 ... Telescopic conveyor 9
...Switching device 10...First switching device 11...Second switching device

Claims (1)

[Claims] A conveyor receives corrugated cardboard sheets cut into predetermined dimensions and conveyed in rows, and the conveyor decelerates and conveys a predetermined number of adjacent corrugated sheets, overlapping a portion of each sheet to form a tiled roof, and then directing it to a stacker. In the tiled conveyance method for corrugated cardboard sheets, the corrugated sheets cut into the predetermined dimensions and conveyed at the first speed are fed into one of two upper and lower separation conveyors; is a second speed lower than the first speed.
When a predetermined number of corrugated sheets are fed into one of the cutting conveyors, the corrugated sheets conveyed in a row at the next speed are separated into the other cutting conveyor. A third speed lower than the second speed is fed into the conveyor, and the other cutting conveyor is moved at a third speed lower than the second speed until the tiled corrugated cardboard sheet conveyed by the one separating conveyor is carried out from the one separating conveyor and reaches a predetermined position. transported by
A method for separating sheets in a tiled conveyance method for corrugated cardboard sheets, characterized in that the speed is increased to a second speed after passing the predetermined position.